achris
More fish than mountain goat
- Joined
- May 19, 2004
- Messages
- 27,468
I linked the factory manual in post #5. If you want a printed copy, just print out the sections you need. It's only a dozen or so pages.
Drive gear is the one that comes from the engine, the one on the end of the yoke. It is the one that drives, hence the name. Driven gear is the one in the bottom of the housing. It is driven by the drive gear, hence the name. If the drive gear has 19 teeth, the driven gear WILL have 17, that is the only combination with a 19 tooth drive gear. (they are not 'mix and match').
You can't assume there's a small spacer just because it was tight. The nut will be tight for the rolling torque set up too.
Shims. Order from Mercury, they come in a pack of various sizes. Order one pack for each bearing location and you'll have all you need. Finding the required shim thickness is dead simple.
1. Drop the shim tool into place.
2. Measure the clearance between the tool face and the gear tooth face (once you get the tool in you'll see very quickly what that means, it's easy).
3. Clearance needs to be 15 thou. If measurement is more than 15 thou, add the difference between the measurement and 15 thou. (if you measured 22 thou, add 7 thou). If the measurement is less than 15 thou, remove the difference. (if you measure 12 thou, remove 4 thou. Or remove 5 thou and add 1 thu)
Shim pack numbers.
For under the outer race of the small bearing on top of the upper drive shaft (sets the upper drive shaft pre-load) - 15-45691A1 (about $9 for the full set)
For the inside of the front of the drive housing to set the drive gear depth . 15-35980A1 (about $12 for the full set) and with that one, make sure the ring is in place. (looks like a piston ring)
For the beaing preload, it's a little harder. Mearue the rolling torque. If the torque is too low, ad a small shim to the underside of the bearing outer race in the top cover and recheck. If the torque is too high, remove a small shim and recheck.
You are going to need a few tools for the job. Shim tools you already know about, you'll also need a rolling torque indicator. Not, a torque wrench will not do the job. The best rolling torque indicators I have seen are these -> http://www.seekonk.com/prod-24-1-100...30-in-lbs-.htm
Chris..
Drive gear is the one that comes from the engine, the one on the end of the yoke. It is the one that drives, hence the name. Driven gear is the one in the bottom of the housing. It is driven by the drive gear, hence the name. If the drive gear has 19 teeth, the driven gear WILL have 17, that is the only combination with a 19 tooth drive gear. (they are not 'mix and match').
You can't assume there's a small spacer just because it was tight. The nut will be tight for the rolling torque set up too.
Shims. Order from Mercury, they come in a pack of various sizes. Order one pack for each bearing location and you'll have all you need. Finding the required shim thickness is dead simple.
1. Drop the shim tool into place.
2. Measure the clearance between the tool face and the gear tooth face (once you get the tool in you'll see very quickly what that means, it's easy).
3. Clearance needs to be 15 thou. If measurement is more than 15 thou, add the difference between the measurement and 15 thou. (if you measured 22 thou, add 7 thou). If the measurement is less than 15 thou, remove the difference. (if you measure 12 thou, remove 4 thou. Or remove 5 thou and add 1 thu)
Shim pack numbers.
For under the outer race of the small bearing on top of the upper drive shaft (sets the upper drive shaft pre-load) - 15-45691A1 (about $9 for the full set)
For the inside of the front of the drive housing to set the drive gear depth . 15-35980A1 (about $12 for the full set) and with that one, make sure the ring is in place. (looks like a piston ring)
For the beaing preload, it's a little harder. Mearue the rolling torque. If the torque is too low, ad a small shim to the underside of the bearing outer race in the top cover and recheck. If the torque is too high, remove a small shim and recheck.
You are going to need a few tools for the job. Shim tools you already know about, you'll also need a rolling torque indicator. Not, a torque wrench will not do the job. The best rolling torque indicators I have seen are these -> http://www.seekonk.com/prod-24-1-100...30-in-lbs-.htm
Chris..
